Someone in the CNN control room was asleep at the wheel Thursday during a town hall event with Anderson Cooper, Dr. Sanjay Gupta and CDC Director Robert Redfield, accidentally letting a question about Trump Derangement Syndrome make it on screen.

When the audience was asked to send questions for Redfield, one that managed to make it on air was: “Is Stage-4 TDS considered an underlying morbidity?”

While it was only up for a few seconds and Cooper never acknowledged it, the prank didn’t escape careful observers.

As someone whose job it was at one point to put social media messages like these on the bottom of the @CNN screen during town halls, I feel bad for whoever let this one slip through... pic.twitter.com/O17f2ldn7Z